1121339987 has 2 divisors, whose sum is σ = 1121339988. Its totient is φ = 1121339986.

The previous prime is 1121339981. The next prime is 1121339993. The reversal of 1121339987 is 7899331211.

It is a balanced prime because it is at equal distance from previous prime (1121339981) and next prime (1121339993).

It is a cyclic number.

It is not a de Polignac number, because 1121339987 - 2⁴ = 1121339971 is a prime.

It is not a weakly prime, because it can be changed into another prime (1121339981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 560669993 + 560669994.

It is an arithmetic number, because the mean of its divisors is an integer number (560669994).

Almost surely, 2^1121339987 is an apocalyptic number.

1121339987 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121339987 is an equidigital number, since it uses as much as digits as its factorization.

1121339987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 81648, while the sum is 44.

The square root of 1121339987 is about 33486.4149618916. The cubic root of 1121339987 is about 1038.9128145129.

The spelling of 1121339987 in words is "one billion, one hundred twenty-one million, three hundred thirty-nine thousand, nine hundred eighty-seven".